Symptoms
- DC fast charger connects but charging doesn't start or is very slow
- Works fine on Level 2 home charging
- Error message specific to fast charging
- Problem worse in cold weather or with a nearly full battery
Likely causes
- CommonBattery too cold for fast chargingMost EVs limit or block fast charging until the battery reaches a minimum temperature, to protect its lifespan.
- CommonBattery already at a high charge levelFast charging naturally slows dramatically above roughly 80% charge and may not be worth using near full.
- PossibleIncompatible connector or charging network account issueSome fast chargers use different plug standards or require specific network account setup.
- Less commonOnboard fast-charging hardware faultA fault specific to the DC fast-charge circuitry can prevent it while Level 2 charging still works fine.
What to do
- Check the battery's current charge level; if it's already high, fast charging naturally slows and may seem like it isn't working.
- In cold weather, consider preconditioning the battery for fast charging if your car has that feature, often available through the navigation system when a fast charger is set as a destination.
- Confirm the fast charger uses a connector type compatible with your car, using an adapter if your car supports and includes one.
- Try a different fast-charging station or network to rule out a specific charger issue.
- Check the charging network's app for account or payment issues that might prevent a session from starting properly.
- If Level 2 home charging always works fine but fast charging never does across multiple stations, that points to the car's fast-charge hardware.
When to call a pro
If fast charging consistently fails across multiple stations while home charging works fine, have a dealer inspect the car's DC fast-charging hardware.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.